A-road
A425 traffic and collisions
The A425 is an A-road of 24.3 miles, from West Northamptonshire to Warwickshire. This page covers its traffic at 16 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 74m vehicle miles
- Average daily traffic 8,374 vehicles a day, both directions
- Busiest section 14,124 B4087 to A452
- HGV share 2.8% of vehicle miles
- Traffic since 2019 −1.8% same count points
- Collisions, 2021 to 2025 108 30.4 per 100m vehicle miles
How busy is the A425?
On an average day in 2025, 8,374 vehicles passed each point on the A425, counting both directions. The busiest section is B4087 to A452 (Warwickshire), with 14,124 a day; the quietest listed is A45 to A423(T), with 5,878.
Busiest sections, 2025
B4087 to A452 carries 1.7 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| B4087 to A452 Warwickshire · 0.6 mi · HGVs 2.0% | 14,124 |
| A452 to A425 Banbury Rd Warwickshire · 1.4 mi · HGVs 0.7% | 12,345 |
| B4455 to Sydenham Drive, Leamington Spa Warwickshire · 2.3 mi · HGVs 1.5% | 10,357 |
| A361 to A4256 West Northamptonshire · 1.4 mi · HGVs 3.2% | 8,924 |
| A4256 to A45 West Northamptonshire · 1.2 mi · HGVs 3.5% | 8,126 |
| B4451 to B4455 Warwickshire · 3.8 mi · HGVs 4.8% | 8,120 |
| Sydenham Drive to B4087 Warwickshire · 0.7 mi · HGVs 2.8% | 7,645 |
| Heathcote Lane to A452 Warwickshire · 1.7 mi · HGVs 0.9% | 6,148 |
| A45 to A423(T) West Northamptonshire, Warwickshire · 9.0 mi · HGVs 3.8% | 5,878 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
West Northamptonshire to Warwickshire · 24.3 miles
A425 traffic and collisions by section
11 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 4 short link roads and spurs (1.6 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A361 to A4256West Northamptonshire | 8,924 | 10 |
| 2 | A4256 to A45West Northamptonshire | 8,126 | 5 |
| 3 | A45 to A423(T)West Northamptonshire, Warwickshire | 5,878 | 17 |
| 4 | A423 to B4451Warwickshire | 15,084 | fewer than 3 |
| 5 | B4451 to B4455Warwickshire | 8,120 | 7 |
| 6 | B4455 to Sydenham Drive, Leamington SpaWarwickshire | 10,357 | 7 |
| 7 | Sydenham Drive to B4087Warwickshire | 7,645 | 10 |
| 8 | B4087 to A452Warwickshire | 14,124 | 8 |
| 9 | A452 to A425 Banbury RdWarwickshire | 12,345 | 9 |
| 10 | A425 Myton Rd to Heathcote LaneWarwickshire | 6,825 | 5 |
| 11 | Heathcote Lane to A452Warwickshire | 6,148 | 4 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A425 as the first road, placed on the nearest section by their recorded position; rates (per 100 million vehicle miles) are shown for sections of half a mile or more with 10 or more.
A425 traffic by vehicle type
Cars and taxis make up 83.3% of the vehicle miles on the A425. HGVs account for 2.8%, rising to 4.8% on B4451 to B4455.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 4.6% |
| 2001 | 3.6% |
| 2002 | 3.4% |
| 2003 | 3.7% |
| 2004 | 3.9% |
| 2005 | 4.0% |
| 2006 | 4.2% |
| 2007 | 4.3% |
| 2008 | 4.1% |
| 2009 | 3.6% |
| 2010 | 3.6% |
| 2011 | 3.6% |
| 2012 | 3.6% |
| 2013 | 3.6% |
| 2014 | 3.5% |
| 2015 | 3.5% |
| 2016 | 3.1% |
| 2017 | 3.4% |
| 2018 | 3.4% |
| 2019 | 3.4% |
| 2020 | 4.0% |
| 2021 | 3.9% |
| 2022 | 3.8% |
| 2023 | 3.6% |
| 2024 | 3.6% |
| 2025 | 2.8% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A425 traffic trend
Traffic on the A425 came to 74.3 million vehicle miles in 2025. At the count points present in both years, it is down 1.8% on 2019, before the pandemic, and down 2.8% on 2015.
Vehicle miles a year
Like for like, traffic is up 8.0% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 70m |
| 2001 | 71m |
| 2002 | 74m |
| 2003 | 75m |
| 2004 | 75m |
| 2005 | 76m |
| 2006 | 75m |
| 2007 | 74m |
| 2008 | 70m |
| 2009 | 70m |
| 2010 | 70m |
| 2011 | 72m |
| 2012 | 75m |
| 2013 | 74m |
| 2014 | 76m |
| 2015 | 77m |
| 2016 | 80m |
| 2017 | 76m |
| 2018 | 78m |
| 2019 | 78m |
| 2020 | 60m |
| 2021 | 66m |
| 2022 | 70m |
| 2023 | 72m |
| 2024 | 73m |
| 2025 | 74m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 8,093 |
| 2001 | 8,206 |
| 2002 | 8,531 |
| 2003 | 8,606 |
| 2004 | 8,667 |
| 2005 | 8,731 |
| 2006 | 8,678 |
| 2007 | 8,526 |
| 2008 | 8,107 |
| 2009 | 8,029 |
| 2010 | 8,100 |
| 2011 | 8,267 |
| 2012 | 8,663 |
| 2013 | 8,559 |
| 2014 | 8,771 |
| 2015 | 8,890 |
| 2016 | 9,257 |
| 2017 | 8,795 |
| 2018 | 8,803 |
| 2019 | 8,846 |
| 2020 | 6,735 |
| 2021 | 7,417 |
| 2022 | 7,968 |
| 2023 | 8,124 |
| 2024 | 8,246 |
| 2025 | 8,374 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
The chart counts the whole road as it was each year, so new or renumbered stretches move it. The percentage changes compare only count points present in both years (84.4% of today’s road for 2019). In 2025, 6 of the 16 count points were counted; DfT estimated the rest from earlier counts and local trends.
A425 collisions
Police recorded 108 collisions with the A425 as the first road from 2021 to 2025, fewer than 3 of them fatal or serious. That is 30.4 per 100 million vehicle miles, close to the 31.5 for all A-roads in Great Britain. On average there were 0.9 a year for each mile of road.
Reported collisions by year
Down 53.3% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 30 |
| 2022 | 20 |
| 2023 | 22 |
| 2024 | 22 |
| 2025 | 14 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
Sections with the highest collision rates
Per 100 million vehicle miles, 2021 to 2025. Sections of half a mile or more with 10 or more collisions.
| Section | Per 100m vehicle miles |
|---|---|
| Sydenham Drive to B4087 Warwickshire · 10 collisions | 105.6 |
| A361 to A4256 West Northamptonshire · 10 collisions | 45.2 |
| A45 to A423(T) West Northamptonshire, Warwickshire · 17 collisions | 20.1 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 15 collisions were recorded at junctions where the A425 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. How we count collisions
Council areas on the A425
In route order. Each is the highway authority DfT files the count points under.
- West Northamptonshire
- Warwickshire
Data sources and methodology
| Figures | Source | Period | Records | Updated |
|---|---|---|---|---|
| Traffic counts and vehicle mix | Road traffic statistics (AADF by count point) Department for Transport Derived statistics UK Motoring | 2000 to 2025 | 16 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 108 reported collisions | 15 September 2026 |
- Annual average daily flow (AADF) is the average number of vehicles passing a point on a typical day of the year, both directions combined.
- Vehicle miles are AADF multiplied by link length and 365, summed over every count point link on the road.
- Sections join count point links between junctions, using the link lines in DfT’s major road database.
- STATS19 covers personal injury collisions reported to the police. Damage-only collisions are not included, and not every injury collision is reported.
- Serious and slight figures are DfT’s adjusted estimates, which allow for police forces moving to injury-based reporting.
- Counts of one or two collisions below Great Britain level are shown as “fewer than 3”.
Contains public sector information licensed under the Open Government Licence v3.0.